CN107100903A - A kind of constant-pressure variable hydraulic power system - Google Patents
A kind of constant-pressure variable hydraulic power system Download PDFInfo
- Publication number
- CN107100903A CN107100903A CN201710515768.6A CN201710515768A CN107100903A CN 107100903 A CN107100903 A CN 107100903A CN 201710515768 A CN201710515768 A CN 201710515768A CN 107100903 A CN107100903 A CN 107100903A
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- CN
- China
- Prior art keywords
- hydraulic
- pressure
- main circuit
- constant
- buncher
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/021—Valves for interconnecting the fluid chambers of an actuator
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/16—Special measures for feedback, e.g. by a follow-up device
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The present invention provides a kind of constant-pressure variable hydraulic power system, including with loading the hydraulic main circuit being connected and the oil supply system being at least connected all the way with hydraulic main circuit, include driver, buncher, hydraulic pump per oil supply system all the way, the driver is connected with buncher, buncher is connected to hydraulic pump, the oil inlet of hydraulic pump is connected with fuel tank, and oil-out is connected to hydraulic main circuit through one-way isolation valve；Pressure sensor and accumulator are connected with hydraulic main circuit, the pressure sensor and driver are connected to control system.Monitor the upper pressure of hydraulic main circuit in real time by pressure sensor and feed back to control system, control system controls buncher to adjust rotating speed supply hydraulic oil in real time according to feedback information；Until the pressure of hydraulic main circuit is reached after goal pressure, it is stopped.The present invention provides hydraulic oil according to flow rate of hydraulic system demand, and motor idle running is reduced to greatest extent, reaches energy-saving and noise-reducing and reduces the purpose of equipment attrition.
Description
Technical field
The invention belongs to technical field of hydraulic pressure, and in particular to a kind of constant-pressure variable hydraulic power system.
Background technology
Heavy industry industry including Ferrous Metallurgy, constant pressure variable displacement pump+asynchronous machine is that hydraulic system power source is the most frequently used
Power unit, asynchronous machine drives constant pressure variable displacement pump with constant rotating speed during work, and constant pressure variable displacement pump itself is according to hydraulic pressure system
Flow needed for system comes regulated variable mechanism so that power source flux keeps balancing with demand volume.This hydraulic system power source
Although spill losses is not present without unnecessary pressure oil during work, in the process of running due to the change of system flow demand
Change, it is substantial amounts of to there is a situation where that motor drives constant pressure variable displacement pump still in high-speed rotation under no flow idle running, this operating mode, causes
A large amount of wastes of energy, at the same time substantial amounts of reactive power also result in the decline of whole power network efficiency.In addition constant pressure is worked as
The load factor that the output of variable pump is not reaching to motor under the discharge capacity of maximum, this operating mode declines, and the efficiency of hydraulic pump
Can reduce so that causing the efficiency of whole transmission system reduces, this be also whole constant pressure variable displacement pump hydraulic power system efficiency not
High the reason for；It is this to be dallied without flow and the operating mode of low-load rate is also accompanied by mechanical wear and rattling noise and polluted etc. and asks
Topic；In addition, the stroking mechanism of variable pump requires that higher is also a problem to oil cleanliness.
The content of the invention
The deficiencies in the prior art in view of the above, it is an object of the invention to provide a kind of constant-pressure variable hydraulic power system
Reactive power, the efficiency of raising active power in system, reduction motor transmission process, so as to reduce the energy of whole transmission system
Waste.
In order to achieve the above objects and other related objects, technical solution of the present invention is as follows：
A kind of constant-pressure variable hydraulic power system, including with load the hydraulic main circuit that is connected and at least all the way with Hydraulic Main
The connected oil supply system of pipeline, includes driver, buncher, hydraulic pump, the driver and speed governing per oil supply system all the way
Motor connection, buncher is connected to hydraulic pump, and the oil inlet of hydraulic pump is connected with fuel tank, and oil-out is connected through one-way isolation valve
To hydraulic main circuit；Pressure sensor and accumulator, the pressure sensor and driver are connected with the hydraulic main circuit
It is connected to control system.
The present invention, during loaded work piece, the closing space pressure of accumulator and hydraulic main circuit can be changed, and be passed through
Pressure sensor monitors the upper pressure of hydraulic main circuit in real time, and the signal of pressure sensor meeting pick-up pressure change simultaneously feeds back to control
System, control system makes buncher adjust rotating speed in real time according to hydraulic main circuit's pressure size by driver；Buncher
Hydraulic pump motion is driven, hydraulic pressure oil is produced；Hydraulic pressure oil passes through one-way isolation valve, into the pipe being connected with accumulator
Road closing space；Until the pressure of hydraulic main circuit is reached after goal pressure, constant-pressure variable system stalls, so as to pass through reality
When compensation hydraulic, it is ensured that hydraulic main circuit's pressure is constant, and reaches the feelings of goal pressure in hydraulic main circuit's pressure value
Under condition, buncher and hydraulic pump are off work, so as to reduce the waste of energy.
Further, the one-way isolation valve is arranged on prexxure of the hydraulic pump oil pipe and exported between accumulator.
Further, it is every to be mounted on one-way isolation valve between oil supply system described all the way and hydraulic main circuit.According to demand
Can parallel multiplex oil supply system, with ensure hydraulic oil supply or formed standby.
Further, the driver be servo-driver or vector frequency converter, the buncher be servomotor or
There is the feedback control of rotating speed between variable-frequency motor, and driver and buncher, be easy to adjust buncher rotating speed in real time.
Further, the energy storage pressure oil pipe is provided with safety relief valve.
Further, the hydraulic pump is variable pump or constant displacement pump, and type is plunger pump, vane pump or gear pump.
Further, the pressure sensor is located between one-way isolation valve and accumulator；Or between accumulator and load.
Further, safety relief valve is installed between hydraulic pump and the one-way isolation valve.
As described above, the beneficial effects of the invention are as follows：
1st, according to system flow demand, motor speed is adjusted in real time, and the power that motor free-running belt is come is reduced to greatest extent
Waste.
2nd, using buncher, the mode with respect to asynchronous machine and variable pump improves the power factor (PF) of system, maximum limit
Degree reduces the reactive power of system.
3rd, motor speed is adjusted according to traffic demand, motor and hydraulic pump are stopped after pressure reaches desired value,
Make motor no longer be always maintained at running at high speed with hydraulic pump, reduce equipment attrition and running noise.
4th, constant displacement pump can be used, so oil cleanliness requirement can be reduced, more use environments can be met, dropped
Low operating cost.
5th, the system can indirectly reduce the consumption of hydraulic oil, cooling water.
Brief description of the drawings
Fig. 1 is systematic schematic diagram of the invention.
Piece mark explanation
1-controller
2-driver
3-buncher
4-hydraulic pump
5-one-way isolation valve
6-safety hydraulic valve one
7-accumulator
8-pressure sensor
9-hydraulic valve platform
10-safety hydraulic valve two
11-hydraulic main circuit
Embodiment
Embodiments of the present invention are illustrated by particular specific embodiment below, those skilled in the art can be by this explanation
Content disclosed by book understands other advantages and effect of the present invention easily.
Embodiment
The energy-saving constant-pressure variable hydraulic power system of the present invention is constant-pressure variable primarily directed to hydraulic power demand
System.
As shown in figure 1, a kind of constant-pressure variable hydraulic power system, including with loading the hydraulic main circuit 11 that is connected and at least
The oil supply system being connected all the way with hydraulic main circuit 11, includes driver 2, buncher 3 and hydraulic pressure per oil supply system all the way
Pump 4, driver 2 is connected with buncher 3, and buncher 3 is connected with hydraulic pump 4, and oil inlet and the fuel tank of hydraulic pump 4 connect
Connect, oil-out is connected to hydraulic main circuit 11 through one-way isolation valve 5；Pressure sensor 8 and storage are connected with hydraulic main circuit 11
Energy device 7, pressure sensor 8 and driver 2 are connected to the controller 1 of system.Wherein, the one end of hydraulic main circuit 11 is by oil supply system
Hydraulic oil is provided, other end connection hydraulic valve platform 9 is connected to load by hydraulic valve platform 9；One-way isolation valve 5 and hydraulic valve platform 9 make
Hydraulic main circuit 11 and the row of accumulator 7 are into closing space；Buncher 3 drives hydraulic pump 4 to move, and produces hydraulic pressure oil；Liquid
Pressure pressure oil is by one-way isolation valve 5, into the pipe sealing space being connected with accumulator 7；During load operation, store
Energy device 7 and the closing space pressure of hydraulic main circuit 11 can be changed, specifically, as hydraulic pressure oil is consumed, and closing is empty
Between pressure reduction, pressure sensor 8 can pick-up pressure change signal simultaneously feed back to controller 1, controller 1 control driver
2 work, driver 2 makes buncher 3 drive hydraulic pump 4 to work, until the pressure of the closing space reaches goal pressure, then
Buncher 3, driver 2 and hydraulic pump 4 are stopped；When the pressure of hydraulic main circuit 11 changes again, pass through pressure
The feedback of force snesor 8, makes buncher 3 and hydraulic pump 4 and starts working, until pressure reaches desired value again.System stream
Amount demand, adjusts motor speed in real time, it is ensured that pressure it is constant.
Wherein, accumulator 7 can in time be adjusted in hydraulic main circuit 11 in the case of the micro- change of pressure, anti-in oil supply system
Present the time slot of regulation；Ensure that pressure will not change too big.
When oil supply system is more than two-way, per be mounted on all the way between oil supply system and hydraulic main circuit 11 it is unidirectional every
From valve 5.One-way isolation valve 5 is arranged on the pressure oil pipe of hydraulic pump 4 and exported between accumulator 7.According to demand can parallel multiplex confession
Oil system, to ensure the supply of hydraulic oil or form standby.
Driver 2 be servo-driver or vector frequency converter, buncher 3 can be servomotor or variable-frequency motor,
And have the feedback control of rotating speed between driver 2 and buncher 3, it is easy to adjust the rotating speed of buncher 3 in real time.Hydraulic pump 4 is
Variable pump or constant displacement pump, can be plunger pump, vane pump or gear pump by type.
To ensure loine pressure safety, the pressure oil pipe of accumulator 7 is provided with safety relief valve 2 10.Hydraulic pump 4 with it is unidirectional
Safety relief valve 1 is installed on the connecting line of isolating valve 5.
To ensure that pressure detecting is accurate, pressure sensor 8 is located at the hydraulic main between one-way isolation valve 5 and accumulator 7
On road 11；Or on the hydraulic main circuit 11 between accumulator 7 and load.
Ensure corresponding buncher 3, driver 2, hydraulic pump 4, pressure sensor first before using the dynamical system
8th, 7 groups of accumulator, one-way isolation valve 5 etc. are all arranged on the correct position of hydraulic system, and it is controlled controllable to ensure that system is in
State, accumulator 7 is according to design requirement nitrogen charging to goal pressure；It can just be devoted oneself to work after pipeline pressure test.
Specifically, the running of whole system is as follows：Controller 1 can be gathered to become from pressure sensor 8 and sent back first
Pressure signal, the pressure signal contrasted with goal pressure setting value in real time, so as to provide rotary speed instruction signal to driving
Device 2, driver 2 turns according to instruction motivation of adjustment source output size, buncher 3 according to the adjustment of the power source size of driver 2
Speed；Because hydraulic pump 4 links together with buncher 3, so the rotating speed of hydraulic pump 4 also changes therewith, due to 4 turns of hydraulic pump
The change of speed can bring the pressure change on accumulator 7 and hydraulic main circuit 11, and pressure sensor 8 continuously monitors this change
Change, and this variable is sent to controller 1, form goal pressure of the closed-loop control at pressure sensor 8 and pressed with setting
Force value is consistent, and buncher 3 stops operating；Due to the buffer action of one-way isolation valve 5, the pressure of this dynamical system can be maintained at
Desired value, until hydraulic valve platform 9 has traffic demand, when hydraulic valve platform 9 is acted and starts consumption pressure oil, pressure sensor 8
The goal pressure at place can decline, and such oil supply system is started working again, and supplement the stabilization that pressure oil maintains goal pressure；Safety
Relief valve ensures that system pressure is not higher than some value, plays a part of protection.In addition, according to the demand of flow system flow, fuel feeding
System can be multigroup form in parallel.
The present invention, keeps hydraulic power system pressure constant by controlling buncher rotating speed；Driver and speed governing electricity
Machine adjusts corresponding rotating speed according to the instruction of controller 1；Hydraulic pump realizes the flow output of demand under the driving of buncher；Store
Energy device group causes whole constant-pressure variable hydraulic power system to be more prone to control, and sensor is used to detect goal pressure actual value.
According to flow rate of hydraulic system demand, adjustment motor speed provides hydraulic oil in real time, and the work(that motor free-running belt is come is reduced to greatest extent
Rate is wasted, and is reached energy-saving and noise-reducing and is reduced the purpose of equipment attrition.Using buncher, with respect to asynchronous machine and variable pump
Mode improves the power factor (PF) of system, and the reactive power of system is reduced to greatest extent；Due to being adjusted according to traffic demand
Motor speed, motor and hydraulic pump are stopped after pressure reaches desired value, motor is no longer always maintained at height with hydraulic pump
Speed operating, reduces equipment attrition and running noise.Using constant displacement pump, oil cleanliness requirement can be reduced, can be met more
Many use environments, reduce operating cost.The system can indirectly reduce the consumption of hydraulic oil, cooling water.
Any person skilled in the art can all be carried out under the spirit and scope without prejudice to the present invention to above-described embodiment
Modifications and changes.Therefore, such as those of ordinary skill in the art without departing from disclosed spirit with
All equivalent modifications completed under technological thought or change, should be covered by the claim of the present invention.
Claims (8)
1. a kind of constant-pressure variable hydraulic power system, it is characterised in that：Including with loading the hydraulic main circuit and at least one being connected
The oil supply system that road is connected with hydraulic main circuit, includes driver, buncher, hydraulic pump, the drive per oil supply system all the way
Dynamic device is connected with buncher, and buncher is connected to hydraulic pump, and the oil inlet of hydraulic pump is connected with fuel tank, and oil-out is through unidirectional
Isolating valve is connected to hydraulic main circuit；Pressure sensor and accumulator, the pressure sensing are connected with the hydraulic main circuit
Device and driver are connected to control system.
2. a kind of constant-pressure variable hydraulic power system according to claim 1, it is characterised in that：The one-way isolation valve peace
Between the outlet of prexxure of the hydraulic pump oil pipe and accumulator.
3. a kind of constant-pressure variable hydraulic power system according to claim 1 or 2, it is characterised in that：Supplied per described all the way
One-way isolation valve is mounted between oil system and hydraulic main circuit.
4. a kind of constant-pressure variable hydraulic power system according to claim 1, it is characterised in that：The driver is servo
Driver or vector frequency converter, the buncher are between servomotor or variable-frequency motor, and driver and buncher
There is the feedback control of rotating speed.
5. a kind of constant-pressure variable hydraulic power system according to claim 1, it is characterised in that：The energy storage pressure oil
Pipe is provided with safety relief valve.
6. a kind of constant-pressure variable hydraulic power system according to claim 1, it is characterised in that：The hydraulic pump is variable
Pump or constant displacement pump, type are plunger pump, vane pump or gear pump.
7. a kind of constant-pressure variable hydraulic power system according to claim 1, it is characterised in that：The pressure sensor position
On working connection between one-way isolation valve and accumulator；Or pressure sensor is located at the working connection between accumulator and load
On.
8. a kind of constant-pressure variable hydraulic power system according to claim 1, it is characterised in that：The hydraulic pump with it is unidirectional
Safety relief valve is installed between isolating valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710515768.6A CN107100903A (en) | 2017-06-29 | 2017-06-29 | A kind of constant-pressure variable hydraulic power system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710515768.6A CN107100903A (en) | 2017-06-29 | 2017-06-29 | A kind of constant-pressure variable hydraulic power system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107100903A true CN107100903A (en) | 2017-08-29 |
Family
ID=59664672
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710515768.6A Pending CN107100903A (en) | 2017-06-29 | 2017-06-29 | A kind of constant-pressure variable hydraulic power system |
Country Status (1)
| Country | Link |
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| CN (1) | CN107100903A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110594241A (en) * | 2019-09-25 | 2019-12-20 | 宣化钢铁集团有限责任公司 | Pressurizer of ladle rotation hydraulic system of continuous casting machine |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19958256A1 (en) * | 1999-12-03 | 2001-06-07 | Mannesmann Rexroth Ag | Stored pressure arrangement or accumulator control method for supplying a consumer , such as an injection cylinder, or a core cylinder of an injection molding machine |
| CN2555528Y (en) * | 2002-07-23 | 2003-06-11 | 浙江大学 | Electrohydraulic combined controller based on frequency converting speed regulation |
| CN101691877A (en) * | 2009-09-04 | 2010-04-07 | 佛山市顺德区震德塑料机械有限公司 | Servo motor control-based multi-pump combination controlled hydraulic power system |
| CN101691878A (en) * | 2009-10-13 | 2010-04-07 | 太原理工大学 | Hydraulic pump flow regulating device |
| CN203430757U (en) * | 2013-08-16 | 2014-02-12 | 昆明理工大学 | Constant pressure digital variable pump |
| CN103629193A (en) * | 2013-11-22 | 2014-03-12 | 江苏兆合电气有限公司 | Device and method for controlling multi-pump hydraulic system |
| CN204533010U (en) * | 2015-04-15 | 2015-08-05 | 宁波友智机械科技有限公司 | A kind of energy saving hydraulic station |
| CN106286438A (en) * | 2016-09-20 | 2017-01-04 | 山西汾西矿业（集团）有限责任公司 | Fully-mechanized mining working emulsion pump constant-pressure liquid supply system and control method thereof |
-
2017
- 2017-06-29 CN CN201710515768.6A patent/CN107100903A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19958256A1 (en) * | 1999-12-03 | 2001-06-07 | Mannesmann Rexroth Ag | Stored pressure arrangement or accumulator control method for supplying a consumer , such as an injection cylinder, or a core cylinder of an injection molding machine |
| CN2555528Y (en) * | 2002-07-23 | 2003-06-11 | 浙江大学 | Electrohydraulic combined controller based on frequency converting speed regulation |
| CN101691877A (en) * | 2009-09-04 | 2010-04-07 | 佛山市顺德区震德塑料机械有限公司 | Servo motor control-based multi-pump combination controlled hydraulic power system |
| CN101691878A (en) * | 2009-10-13 | 2010-04-07 | 太原理工大学 | Hydraulic pump flow regulating device |
| CN203430757U (en) * | 2013-08-16 | 2014-02-12 | 昆明理工大学 | Constant pressure digital variable pump |
| CN103629193A (en) * | 2013-11-22 | 2014-03-12 | 江苏兆合电气有限公司 | Device and method for controlling multi-pump hydraulic system |
| CN204533010U (en) * | 2015-04-15 | 2015-08-05 | 宁波友智机械科技有限公司 | A kind of energy saving hydraulic station |
| CN106286438A (en) * | 2016-09-20 | 2017-01-04 | 山西汾西矿业（集团）有限责任公司 | Fully-mechanized mining working emulsion pump constant-pressure liquid supply system and control method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110594241A (en) * | 2019-09-25 | 2019-12-20 | 宣化钢铁集团有限责任公司 | Pressurizer of ladle rotation hydraulic system of continuous casting machine |
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Application publication date: 20170829 |
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